23231221432 has 8 divisors (see below), whose sum is σ = 43558540200. Its totient is φ = 11615610712.

The previous prime is 23231221427. The next prime is 23231221451. The reversal of 23231221432 is 23412213232.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×23231221432² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23231221397 and 23231221406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1451951332 + ... + 1451951347.

It is an arithmetic number, because the mean of its divisors is an integer number (5444817525).

Almost surely, 2^23231221432 is an apocalyptic number.

It is an amenable number.

23231221432 is a deficient number, since it is larger than the sum of its proper divisors (20327318768).

23231221432 is a wasteful number, since it uses less digits than its factorization.

23231221432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903902685 (or 2903902681 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

Adding to 23231221432 its reverse (23412213232), we get a palindrome (46643434664).

The spelling of 23231221432 in words is "twenty-three billion, two hundred thirty-one million, two hundred twenty-one thousand, four hundred thirty-two".